WO2000048657A1 - Echangeur d'humidite pour air aspire - Google Patents

Echangeur d'humidite pour air aspire Download PDF

Info

Publication number
WO2000048657A1
WO2000048657A1 PCT/SE2000/000313 SE0000313W WO0048657A1 WO 2000048657 A1 WO2000048657 A1 WO 2000048657A1 SE 0000313 W SE0000313 W SE 0000313W WO 0048657 A1 WO0048657 A1 WO 0048657A1
Authority
WO
WIPO (PCT)
Prior art keywords
moisture
moisture exchanger
exchanger according
nostril
exchange unit
Prior art date
Application number
PCT/SE2000/000313
Other languages
English (en)
Inventor
Per-Olof Barr
Original Assignee
Barr Per Olof
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Barr Per Olof filed Critical Barr Per Olof
Priority to AU32037/00A priority Critical patent/AU3203700A/en
Publication of WO2000048657A1 publication Critical patent/WO2000048657A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1045—Devices for humidifying or heating the inspired gas by using recovered moisture or heat from the expired gas

Definitions

  • the present invention relates to a moisture exchanger of the kind set forth in the preamble to claim 1.
  • a moisture exchanger of the kind set forth in the preamble to claim 1.
  • Such a device is used for recovering some of the moisture in air expired through the nose.
  • Moisture is accordingly absorbed in the moisture exchanger, released in the next inspiration and picked up by inspired air, thereby increasing the latter's moisture content.
  • Mucous membranes and airways are therefore humidified, increasing patient well-being and counteracting irritation of mucous mem- branes and airways.
  • a moisture exchanger is an especially useful aid in environments with dry air or for people who are sensitive in this respect.
  • Such a moisture exchange is previously known through e.g. US 5, 117, 820 which shows a nasal filter inserted into a nostril.
  • the filter is intended for use e.g. in moisture exchange.
  • the compressed filter is inserted into a person's nostril and then expands to fill the nostril.
  • the filter is located inside the nostril, conveying the disadvantage that its capacity for moisture exchange is limited by the dimensions of its location.
  • the filter poses a major resistance to flow, as air is forced to traverse a labyrinthine path through it. This is due in part to the fact that the moisture exchanger is also intended to have a filtering function. As a result of its location in the nose, the filter can also be difficult to insert and remove and may cause some discomfort when removed.
  • a nasal filter is also known from US 5,568,808. It is not primarily intended for moisture exchange, although there is some humidification of the nostril. The design is complex, and the filter has other disadvantages of the kind displayed by the filter in US 5,117,820.
  • the objective of the present invention is to achieve a moisture exchanger without the shortcomings associated with previously known moisture exchangers of a similar kind.
  • the objective is particularly to achieve a moisture exchanger with a high moisture exchange capacity but which is still comfortable to use and easy to insert into and remove from a person's nostril.
  • This objective is achieved with the invention when a moisture exchanger of the kind set forth in the preamble to claim 1 has the special features cited in this claim's characterising part.
  • the moisture exchanger can be dimensioned to have sufficient capacity and avoid aspects, such as deformation, which limit its efficacy. Since moisture exchange largely occurs in the external part, the internal part can have an optimal design with respect to comfortable insertion and retention in the nostril. Thus, the moisture exchanger according to the invention is both effective and user-friendly.
  • the internal part is largely tubular and provided with an attachment means.
  • the attachment means suitably consists of an annular, convex bulge.
  • the attachment means retains the moisture exchanger in the nostril more reliably.
  • the cross-section of the external part is larger than the cross-section of the internal part. This accordingly makes it possible to increase the size of the moisture exchange unit for achieving maximum effect.
  • a suitable cross-sectional size range is 15-25 mm.
  • the moisture exchange unit is appropriately provided with axial and par- allel channels. It could then be suitably devised like a pleated roll of paper. This design combines a large moisture exchange area with low resistance to flow.
  • the internal part and the external part are connected by a middle part which could suitable be funnel- shaped.
  • the entire moisture exchange unit would then be actively ef- fective, as the moisture exchange unit has a larger cross-section than the internal part.
  • Figure 1 shows how the moisture exchanger is inserted when used by a person
  • Figure 2 is a longitudinal section through a moisture exchanger according to the invention
  • Figure 3 is a perspective view of the moisture exchange unit in Fig. 2.
  • Fig. 1 shows how a moisture exchanger 1 according to the invention is worn by a person during use. A moisture exchanger can then be worn in each nostril. The moisture exchanger can be worn by people while awake and asleep.
  • the moisture exchanger 1 is depicted in greater detail in Fig. 2 and con- sists of a holder unit 2, 3, 8 and a moisture exchange unit 4.
  • the holder rotates symmetrically around the centre axis A but could also have some other cross-sectional shape.
  • the holder unit forms an enclosure with an external part 3 and an internal part 2 connected by a middle part 8.
  • the exter- nal part 3 has an outward-facing orifice 5, and the internal part has an inward- facing orifice 6.
  • the two parts are joined by the middle part 8,
  • the holder unit 2, 3, 8 is made of soft plastic and can be relatively thin-walled.
  • the moisture exchange unit 4 is arranged in the external part 3.
  • the external part 3 has a larger diameter than the internal part 2, and the moisture exchange unit 4 has a larger diameter than the nostril.
  • the middle part 8 is funnel-shaped to create an unimpeded area on the inner side of the entire moisture exchange unit 4 at the transition between the external part 3 and internal part 2. In this manner, its entire length can be used, and no airflow channels are blocked, as would be the case if the connecting wall were flat.
  • the internal part 2 has a bulge 7 with a larger di- ameter than the adjacent area of the internal part. The wall could possibly be thicker at the bulge 7. The bulge 7 helps to retain the moisture exchanger in the nostril when the walls of the nostril press against the outer periphery of the bulge 7 and/or against the side facing the opening of the nostril.
  • Fig. 3 shows the moisture exchange unit 4 in perspective.
  • it consists of pleated paper rolled into a cylinder. This accordingly forms axial channels for the flow of air.
  • the paper is used which is made hygroscopic by e.g. the addition of calcium chloride or lithium chloride.
  • the paper in the moisture exchanger can be impregnated with some medicinally active substance for administration to the patient at inspiration.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Veterinary Medicine (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Drying Of Gases (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

La présente invention concerne un échangeur d'humidité pour air aspiré du type de ceux que l'on introduit dans la narine d'une personne. Il comprend un module porteur (2, 3, 8) et un module d'échange d'humidité (4). L'objectif de cette invention est d'améliorer l'échange d'humidité et de rendre le maniement de cet échangeur plus pratique. Selon l'invention, le module porteur (2, 3, 8) possède une partie intérieure (2) et une partie extérieure (3). La partie intérieure (2) est conçue pour être introduite dans la narine d'une personne pendant l'utilisation, tandis que la partie extérieure (3) est située à l'extérieur de la narine. Le module d'échange d'humidité (4) est agencé dans la partie extérieure.
PCT/SE2000/000313 1999-02-18 2000-02-17 Echangeur d'humidite pour air aspire WO2000048657A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32037/00A AU3203700A (en) 1999-02-18 2000-02-17 Moisture exchanger for breathing air

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9900561-3 1999-02-18
SE9900561A SE522973C2 (sv) 1999-02-18 1999-02-18 Fuktväxlare för andningsluft

Publications (1)

Publication Number Publication Date
WO2000048657A1 true WO2000048657A1 (fr) 2000-08-24

Family

ID=20414522

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/000313 WO2000048657A1 (fr) 1999-02-18 2000-02-17 Echangeur d'humidite pour air aspire

Country Status (3)

Country Link
AU (1) AU3203700A (fr)
SE (1) SE522973C2 (fr)
WO (1) WO2000048657A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905335A (en) * 1974-03-21 1975-09-16 Gerald J Kapp Nasal air filter
FR2536659A1 (fr) * 1982-11-26 1984-06-01 Sousa Lopes Manuel De Appareil respiratoire de protection par application nasale
US5113857A (en) * 1990-08-27 1992-05-19 Stair Dickerman Breathing gas delivery system and holding clip member therefor
US5853884A (en) * 1997-03-26 1998-12-29 Whatman, Inc. Method for producing unsupported fiber bundles for HME and other filtration applications

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905335A (en) * 1974-03-21 1975-09-16 Gerald J Kapp Nasal air filter
FR2536659A1 (fr) * 1982-11-26 1984-06-01 Sousa Lopes Manuel De Appareil respiratoire de protection par application nasale
US5113857A (en) * 1990-08-27 1992-05-19 Stair Dickerman Breathing gas delivery system and holding clip member therefor
US5853884A (en) * 1997-03-26 1998-12-29 Whatman, Inc. Method for producing unsupported fiber bundles for HME and other filtration applications

Also Published As

Publication number Publication date
AU3203700A (en) 2000-09-04
SE522973C2 (sv) 2004-03-23
SE9900561D0 (sv) 1999-02-18
SE9900561L (sv) 2000-08-19

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